Stove-door.



FREDERICK KUMBER,

STOVE- vPatented December 22, 1903.

PATENT OFFICE.

HAEN'ZEgAND EMIL IIAENZEOEPITTSBURG, PENNSYLVANIA. f

Doon.

SFEGIFICATION formingpart of vLetters Patent No. 747,731, dated December 22, 1903.

Application filed November 18, 1902. Serial No. 131.850. (No model.)

To all whom it may concern.'

Be it known that we, FREDERICKKUMBEE, HENRY HAENZE, and EMIL HAENZE, citizens of the United States of America, residing at Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Stove-Doors, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in attachments for stoves, latrobes, and furnaces, Vand has for its object the provision of novel means whereby the draft may be regulated to any desired degree.

The present invention is particularly applicable for stove doors having a rotary movement wherein it is desired to automatically lock the door at any desired point, providing means for regulating the heat and economizing in the use of fuel.

A still further object of our invention is to construct a device of thek above-described character that will be extremely simple, strong,durable, comparatively inexpensive to manufacture, and highly efficient in its use.

Our invention still further consists in the novel construction,combination,and arrangement of parts, as will be hereinafter more specifically described and then particularly pointed out in the claim.

In describing the invention in detail reference will be had to the accompanying drawings, forming a part of this specification, and wherein like numerals of reference will indicate like parts throughout the several views, in which- Figure l is a verticalcross-section through the stove provided with our improvement. Fig. 2 isa fragmentary cross-sectional view taken at right angleslto Fig. l. Fig. 3 is a detail plan view of the hinge disassembled. Fig. 4 is an elevation of the crank.V Fig. 5 is a similar view of the gravity-pawh Fig. 6 is a detail View of the ratchet-wheel. Fig. 7

is a side elevation of the stove, partly broken away and being provided with our improvement.

In the drawings the referencenumerall qo represents the body of the stove, in which is secured a shaft 2. Upon this shaft is rigidly secured a segmental door 3. The shaft 2 extends through the walls of 'the stove l and has secured thereto a ratchet-wheel 4, carry- 5 5 ing a boss 5, in which is arranged aset-screw 6, providing means for securely attaching said ratchet wheel to the shaft. The shaft 2 carries a square end '7 to receive the crankhandle 8, which is retained in proper po- 6o sition by means of the split key 9. To the rear face of the front wall of the stove is secured a hinge 10, in which is pivotally secured a gravity-pawl 11, carrying a handle with a hook portion 14, which is adapted. to

engage the teeth of the ratchet-wheel 4.

The operation of our improved device is as follows: The crank 8 is operated until the `12, the latter being providedat its lower end door has reached the desired position, when 7o the hook portion 14 of the gravity-pawl ll will engage one of the teeth of the ratchet-wheel, which will tend to lock the shaft 2, carrying the door 3, in the desired position. When it isV desired to again adj ust thedoor, the haudle 12 of the gravity-pawlis operated, thereby releasing the .engagement of the gravitypawl and permitting the readjustment of the door. 1

vIt will be noted that the parts maybe 8o easily assembled and removed when desired; furthermore, that in. case any of the parts should become broken new parts may be readily substituted. Itis further to be noted that slight changes may be made in the details of construction Without departingfrom the general spirit of our invention.

Having fully described ourinvention, what In testimony whereof we afx our signa,- tures in the presence of two witnesses.

FREDERICK KUMBER. HENRY HAENZE. EMIL I-IAENZE.

ratchet-wheel secured to the shaft exterior of the stove, said shaft extending beyond said ratchet-Wheel and having a squared end, i with a crank adapted to be engaged over said end, a hinge secured to the rear face of l the front Wall of the stove, and a pztwl oon- Witnesses:

l neoted tothe hinge and engaging said ratcheti H. C. EVERT, wheel. l JOHN GROETZINGER. 

